Thin film high definition dimensional image display device and methods of making same

ABSTRACT

A high definition thin lens dimensional image display device and methods of manufacturing the same. The thin lens dimensional image display device generally includes a lens array on a first surface of a film, such as a lenticular lens array or a fly&#39;s eye lens array, with a printed imaged either printed directly on a second planar surface of the film, or on a separate substrate that is laminated thereto. The resulting display device offers a lower cost display device having greater flexibility for a wider variety of applications than traditional image display devices, without compromising image quality. Processes for manufacturing the display device include printing on a pre-fabricated thin lens web, inline printing of an image and patterning of the lens array, and inline printing of a substrate and application of a coating to the substrate which is subsequently patterned or embossed.

RELATED APPLICATIONS

This application is a continuation application of U.S. patentapplication Ser. No. 12/562,795, filed Sep. 18, 2009, which claims thebenefit of U.S. Provisional Application Ser. No. 61/098,172 filed Sep.18, 2008, and U.S. Provisional Application Ser. No. 61/223,882 filedJul. 8, 2009, all of which are entitled “THIN FILM HIGH DEFINITIONDIMENSIONAL IMAGE DISPLAY DEVICE AND METHODS OF MAKING SAME,” and all ofwhich are hereby incorporated by reference in their entireties.

FIELD OF THE INVENTION

The invention relates generally to dimensional image display devicesincluding a plastic film having an array of lenses and a dimensionalimage to be displayed through the array. More particularly, theinvention relates to high definition dimensional image display devicesmanufactured from a thin film having a focal distance of ten mils orless (1 mil=0.001″) and having a lens array that can be used to displayor view an animated, 3D, or other dimensional image that is printedusing a technique in which critical registration is not required.

BACKGROUND OF THE INVENTION

Dimensional image display devices are used to create visual effects suchas, for example, 3D effects, animation, depth, and other such types ofgraphics. The dimensional image display devices can be applied tovarious articles as eye-catching promotional tools, advertising,branding, games, and the like because the dimensional images offereye-catching images by providing multiple images and/or animation.Examples of articles can include, for example, containers, cups,packaging, wrappers, tubes, envelopes, greeting cards, invitations,napkins, posters, business cards, fabrics and clothing, billboards,stickers, labels, badges, pens, magnets, postcards, identification orgift cards, and any of a variety of articles.

Dimensional image display devices typically incorporate a printed imageproximate a lens array. The printed image can be either directly bondedor printed to the lens array, or printed on a separate substrate andlaminated to the lens array. Image segments or elements are printedusing high resolution, and precise registration techniques to form theoverall image. One such printing technique includes interlacing images,in which a composite of two or more images are interlaced with eachother in individual slices or segments to form the overall image thatwill be viewed through a lens array. The interlaced image is thenconfigured or mapped so that each lens of the array focuses on at leasta portion of the interlaced image. The interlaced image is configured toaccommodate both viewing distance and curvature through the lens.

Ink-to-ink registration is a term of art that describes the placementaccuracy of different, or overlapping colors in relation to one anotheron an image, such as an interlaced image, from a four color process(4-CP) separation or other printing technique. When printing an imagethat has more than one color, depending on the method of printing, it isnecessary to print the image or image element a separate time, and/or onmultiple units, for each separate color. So that the final image isconsistent, and so each of the colors lines up correctly, a system ofregistration is necessary. Ink-to-ink registration accuracy isparticularly important in printing of interlaced images, as poorregistration accuracy can result in a low quality dimensional image,such as image ghosting or color shift, loss of distinct motion, and thelike, therefore creating excess waste and expense.

Lens-to-ink registration can be defined as the registration accuracy ofthe image or image elements to the lenses of the lens array. Lens-to-inkregistration accuracy is critical in dimensional image display devicesas poor lens-to-ink registration accuracy can also result in loss ofdistinct motion, unfocused or unrecognizable images, flipped orotherwise skewed images, and the like, again creating excess waste andexpense.

One type of dimensional imaging technology well-known in the artincludes lenticular image technology. Lenticular image technologyincludes a lenticular image, such as an interlaced image, in combinationwith a lenticular lens array. The lenticular lens array is formed from aweb or sheet including a plurality of substantially parallel elongatedcylindrical lenticules or lenses on one surface. The second surface isplanar. Typically, the lenticular lens array is formed from a plasticmaterial and can be formed from any of a variety of techniques includingcasting, coating, embossing, extruding, and the like. The interlacedimage can be printed directly on the planar second surface, or can beprinted on a separate substrate and subsequently laminated to thelenticular lens array by a clear adhesive, fusing, or other similartechniques. Examples of lenticular image technology can be found in U.S.Pat. Nos. 6,900,944 to Tomczyk; 6,424,467 to Goggins; and 7,359,120 toRaymond et al., the disclosures of which are incorporated herein byreference.

Currently available methods can provide a lens sheet or lenticulatedsheet array, which can vary in thickness or caliper, for example, fromabout 10 mils to about 40 mils. The thickness of the extruded lenticularlens layer is suggested by the formula: r=C×f or r=[(n′−n)/n′]×f where ris the radius of curvature of a lenticular lens, C is a constant, f isthe focal length of optimal focus thickness for the plastic, n′ is theindex of refraction of the lens construction material, such as anextruded plastic, and n is index of refraction of air. From the formulait is evident that the thicker the plastic the lower the pitch orlenticules per inch (LPI) and the lower the pitch, the coarser the lens.A coarse lens can give undesirable lens effects, for example, distortionof an underlying image. A coarser lens requires image graphics and textto be significantly large to avoid lens undesirable lens effects. Whenprinting a lenticular image on a lenticular lens, the lens needs to beparallel to the interlace image, such as, for example within +/−½lenticule per ten inches. If this is not maintained, the image does nothave an acceptable vertical flip, but rather a skewed flip. Skew can bedefined as unacceptable ink-to-lens registration accuracy of thevertical lenticular image elements to the vertical lenticular lenses.

Another type of dimensional imaging technology includes fly's eye orbug's eye image technology. Fly's eye or “integral” lens arrays areformed from a web or sheet including a plurality of domes orsemi-circular structures, rather than the elongated lenses of lenticulartechnology. Similar to lenticular, an image, such as an interlacedimage, can be printed on the planar side of the lens sheet or web, orprinted on a separate substrate and laminated thereto. There are anumber of benefits to using a fly's eye lens as opposed to a lenticularlens. The fly's eye lens is essentially a lenticular lens in multipledirections tangentially around the lens. This essentially allows one notonly to interlace an image from left to right (horizontal direction),but also up and down (vertical direction), diagonally, or anycombination thereof to give additional animated effects.

Current methods of producing dimensional images, such as lenticularimages, include printing of lenticular sheets through a sheet fed presswhere, as discussed above, the caliper ranges from about 10 mils toabout 40 mils. These sheets then go through additional offlineprocessing steps. The result is an expensive lenticular display devicewith a limited number of applications because of its rigidity due to itsoverall thickness. At least two factors drive the cost of the lenticulardisplay device: the amount of plastic used in creating the lens, and thenumber of process steps that are needed to print and convert alenticular product.

To reduce the cost of manufacture by reducing the amount of plasticused, a lens sheet having a thinner caliper or gauge thickness is used,such as, for example, a lens sheet of about ten mils or less. When usinga thinner lens, the pitch, or number of lenses per inch, is higher basedon the formula described above. As the pitch increases, a width of eachimage element or slice of the interlaced image becomes thinner, which inturn makes ink-to-ink registration accuracy and resolution morecritical. It has been found that ink-to-ink registration accuracy on athinner caliper lens plastic sheet on a sheet fed press is extremelydifficult, resulting in poor quality images.

Secondly, by switching the current sheet-fed process to a web press withinline laminating and finishing capabilities, it is possible tosignificantly reduce cost due to fewer process steps. Web presses aresuited for running and printing thinner substrates and can have optionalinline finishing capabilities, such as lamination and converting.However, web presses tend to have less ink-to-ink registration accuracyfrom color to color than sheet fed presses because the web tends towander or “walk” from side to side through the press ink units if nottightly controlled. In particular, there tends to be more movement ofthe web as the caliper is decreased, especially if there is significantgauge thickness variation. Further, such problems can be exacerbatedwith thin films and substrates as a result of baggy edges of the web inthe positions where web guidance devices read guidance information,thereby misguiding the web. Such devices are often expensive andtemperamental or difficult to control within the tolerances needed fordimensional image display devices.

Attempts have been made to produce a high definition thin lenticularlens for viewing interlaced images. U.S. Pat. No. 6,424,467 to Gogginsdescribes a high definition lenticular lens having an arc angle greaterthan about 90 degrees and a width of less than about 0.0067 inches (6.7mils). The lens has a gauge thickness that is equal to or substantiallyequal to the focal length. However, the Goggins disclosure is limited tothe lens array material, and does not address the printing or printingregistration issues discussed supra. U.S. Pat. No. 7,359,120 to Raymondet al. discloses a method of manufacturing a device for displaying aninterlaced image including creating an “ultrathin” lens array in thefilm by forming lens sets, and bonding an interlaced image includingsets of elongate image elements to a second side of the film. Each ofthe lens sets is configured with lenses for focusing light from one ofthe image elements in a particular paired set of image elements bycreating a unique configuration or cross-sectional shape for each lensof the lens set. The fabrication of the device can be done using a webprocess. The Raymond et al. disclosure, however, does not discuss theink-to-ink registration issues, and rather focuses on eliminating thecritical thin resolution of particular image elements that wouldotherwise be needed in traditional lenticular image technology.

Therefore, there remains a need for a dimensional image display andmethod of making such that would eliminate the need for criticalink-to-ink registration accuracy such that the finished piece or articlewould virtually always give a dimensional or motion effect when printedusing a web press at any lens gauge thickness and pitch.

SUMMARY OF THE INVENTION

According to embodiments of the invention, a thin film display devicefor a displaying dimensional image can generally include a substratecomprising a lens array on at least a portion of the substrate, and animage layer defining a dimensional image, such as an animation or 3-Dimage, that is viewable through the lens array. The lens array comprisesa plurality of lenses, such as lenticular lenses or fly's eye lenses.The lens coupled with the image layer defines a light steering opticallayer having a focal distance measured from the peak of the lens orlenticule through the image layer. The light steering optical layer, orfocal length, is about ten mils or less in thickness, such as, forexample, five mils, and has a drape or flexibility of at least abouteight degrees measured from a horizontal surface such that the displaydevice can be used in a variety of applications, such as labels,packaging, security applications, and the like.

In one embodiment of the invention, the lens array comprises a preformedlens array material. A dimensional image, such as an interlaced image,hologravure image, or the like is printed on the preformed lens materialon a surface opposite the lenses, a separate substrate, or both. Theseparate substrate is then laminated to the preformed lens material toform the display device.

In another embodiment of the invention, the substrate comprises a film,such as a plastic film. One of the surfaces of the film is embossed toform the lens array. A dimensional image is printed on the film on asurface opposite the lens array before and/or after the film isembossed. Alternatively, the image is formed on a substrate and thesubstrate is laminated to the film before or after embossing.

In yet another embodiment of the invention, a coating is applied to asubstrate. The coating can be applied and then subsequently patterned toform the lens array, or the coating can be applied in a pattern, such asby printing, thereby forming a lens array. The substrate can be printedwith the image on the same side that the coating is applied before thecoating is applied, or can be printed on the opposite side of thesubstrate if the substrate is transparent before or after the coating isapplied. The coating can then be subsequently cured.

The above summary of the invention is not intended to describe eachillustrated embodiment or every implementation of the present invention.The figures and the detailed description that follow more particularlyexemplify these embodiments.

BRIEF DESCRIPTION OF THE DRAWINGS

The invention may be more completely understood in consideration of thefollowing detailed description of various embodiments of the inventionin connection with the accompanying drawings, in which:

FIG. 1A is a cross-sectional view depicting a display device accordingto an embodiment of the invention;

FIG. 1B is a cross-sectional view depicting a display device accordingto another embodiment of the invention;

FIG. 1C is a cross-sectional view depicting a display device accordingto yet another embodiment of the invention;

FIG. 2 is a perspective view depicting a lenticular lens array accordingto an embodiment of the invention;

FIG. 3 is a perspective view depicting a fly's eye lens array accordingto an embodiment of the invention;

FIG. 3 a is a engineering schematic depicting a fly's eye lens arraypattern according to another embodiment of the invention;

FIG. 4 is a perspective view depicting a variety of articlesincorporating a dimensional image display device according toembodiments of the invention;

FIG. 5 is a block diagram depicting a pre-formed lens array processaccording to an embodiment of the invention;

FIG. 6 is a block diagram depicting an inline patterned lens arrayprocess according to an embodiment of the invention;

FIG. 7 is a block diagram depicting an inline patterned coating processaccording to an embodiment of the invention;

FIG. 8 is a top view depicting an imaged web for use with a fly's eyelens array; and

FIG. 9 is a system for producing a dimensional image display deviceaccording to an embodiment of the invention.

While the invention is amenable to various modifications and alternativeforms, specifics thereof have been shown by way of example in thedrawings and will be described in detail. It should be understood,however, that the intention is not to limit the invention to theparticular embodiments described. On the contrary, the intention is tocover all modifications, equivalents, and alternatives falling withinthe spirit and scope of the invention as defined by the appended claims.

DETAILED DESCRIPTION OF THE DRAWINGS

Embodiments address the above-described deficiencies and drawbacksinherent with fabricating thin lens dimensional image display devices,thereby increasing the available applications for dimensional imagedisplay devices while reducing the cost to fabricate the display device.Various embodiments are directed to thin lens dimensional image displaydevices including a lens array formed on a first surface of a substrate,such as plastic film, and a printed image on the second opposing surfaceof the substrate and/or a separate substrate bonded to the lens array.The lens array can comprise a plurality of lenses such as a lenticular,integral web (fly's eye), or any of a variety of suitable lens shapes.In one embodiment of the invention, the lens array comprises an integralweb or fly's eye array such that the animation can be incorporated inthe horizontal, vertical, or diagonal direction, or any combinationthereof.

A gauge thickness of the thin film display device is the thickness of a“light steering optical layer” made up of the lens and the image. Thegauge thickness can be about ten mils or less, such that the displaydevice can be fabricated using web processes. The gauge thickness, i.e.the focal distance, is measured from the peak of the lens or lenticulethrough the image layer. The gauge thickness can be greater than tenmils; however such webs, particularly when the substrate is plastic,tend to suffer from “roll set” which is when the plastic takes on thecurl of the roll causing problems during web processing, and resultingin a curled finished product.

The image is printed either directly onto the substrate that the lensarray is formed on, or onto another substrate that is laminated to thelens array. The image is printed using an image technique that does notrequire precise color-to-color or ink-to-ink registration accuracy. Inone embodiment of the invention, the image technique is one-coloranimation where the animation image is incorporated in a single color ofthe process colors, such as a 4-CP image. In other embodiments of theinvention, the image technique is multi-color animation where theseveral colors are located in the same area of a substrate but animationis independent with respect to each color. In another embodiment of theinvention, the image technique is hologravure, otherwise known asInfinidepth®, which includes a holographic fringe pattern that gives adepth or 3D effect, again incorporated in a single color of the processcolors, such as a 4-CP separation or image. In yet another embodiment ofthe invention, the image technique is bi-directional interlaced image.In yet another embodiment of the invention, a combination of one or moreof these image techniques is incorporated.

The display device can be fabricated using a number of low cost, highspeed processes. In one embodiment of the invention, a high speedprinting process using a pre-fabricated lens array film web is used,wherein the lens array film web is formed by casting, extrusion, or thelike. In another embodiment, a web press is used incorporating inlineprinting and embossing such that the plastic film or other substrate isprinted on the second surface of the film before and/or after a lensarray is embossed on the first surface of the film. In yet anotherembodiment, a web press is used incorporating inline printing withinline application of a coating that is embossed or patterned uponapplication to a substrate, such as a plastic film or paper. The coatingcan be pre-, simultaneous, and/or post cured as it is patterned. The websubstrate can be printed before and/or after the lens array is formed.In another embodiment, a pre-printed web is spot-embossed with a lenspattern in a converting line. Each of the web processes can furtherinclude inline and/or offline finishing capabilities such as, forexample, curing, additional printing, converting, packaging, laminating,cutting, punching, and the like.

The thin lens image display device can be used in a wide variety ofapplications and articles. It can be subsequently converted ormanufactured into packaging films, labels, stickers, or wrappers thatlater can be applied to or around a formed product or formed products.Alternatively, the film web can be used alone, or laminated to one ormore other substrates to form the article itself, such as a wrapper,bottle, poster, flexible packaging, or the like. In one embodiment, thelens array can be spot applied to one or more portions of packaging,such as a portion of a box. In another embodiment, the thin lens imagedisplay device can be used in security applications such as, forexample, security labels, tax stamps, identification cards anddocuments, checks, currency, authentication labels, and the like. Forexample, an authentication label incorporating a thin lens image displaydevice for high end often copied products can be useful for ease ofidentification by a customs agent to identify a copied product.

The combination of a thin film lens array fabricated using web processeswith multiple inline capabilities reduces the cost of manufacturingdimensional image display devices, while increasing the flexibilitythereby expanding the number of applications. Additionally, the use ofthin films and web processes allows use of lower cost materials,including virgin and recycled materials and blends thereof, such aspolypropylene (PP), amorphous polyethylene terephthalate (APET), andpolyethylene (PE) currently used in packaging applications, furtherreducing costs.

In one embodiment of the invention, referring to FIG. 1A, a highdefinition thin film dimension display device 100 a generally comprisesa substrate 101, a lens array 102, and a dimensional image 104. In oneembodiment, lens array 102 can comprise a preformed lens materialincluding a first non-planar surface 106 formed of a plurality of lenses108 on at least a portion of first surface 106, and a substantiallyplanar second surface 110. Image 104 can be either printed directly onat least a portion of second surface 110, or can be printed on aseparate substrate 101 and laminated to lens array 102 to form acomposite structure. Such substrates can comprise paper, plastic,metallized substrates such as foil, paperboard, cardboard, glass, andcombinations thereof. Lamination can be accomplished via a clearadhesive sandwiched between second surface 110 and substrate 101, or anyof a number of laminating techniques.

Lens array 102 can comprise plastic material such as, for example,polyester, polycarbonate (PC), polyvinyl chloride (PVC), polyethyleneterephthalate (PET), amorphous polyethylene terephthalate (APET),glycol-modified polyethylene terephthalate (PETG), polypropylene (PP),polyethylene (PE), polystyrene (PS), and other suitable plastics andcombinations thereof. The plastic material can be transparent ortranslucent such that image 104 can be seen through lens array 102. Thinfilm display device 100 a can have a gauge thickness (or focal distance)“t1” from about one to about ten mils, or about five mils or less, whichincludes lens array 102, and image 104 (light steering optical layer).

In another embodiment, shown in FIG. 1B, high definition thin filmdimension display device 100 b generally comprises a substrate 101comprising a plastic material that can be embossed or otherwisepatterned by the application of heat and/or pressure, laser engraving,or any of a number of known embossing techniques to form lens array 102,and a dimensional image 104. Dimensional image 104 can be printed on thesubstrate 101 opposite the embossing, or on a separate substrate (notshown) and laminated or bonded thereto. Thin film display device 100 bcan have a gauge thickness (or focal distance) “t2” from about one toabout ten mils, or about five mils or less, which includes lens array102, and image 104 (light steering optical layer).

In yet another embodiment, shown in FIG. 1C, high definition thin filmdimension display device 100 c generally comprises substrate 101 suchas, for example, plastic, paper, and the like, having a clear coating,such as a water-based coating, solvent-based coating, radiation or UVcurable coating or varnish or the like, applied to at least a portion ofthe plastic substrate. The clear coating is capable of being patternedby any of a number of techniques known in the art to form lens array102, which will be described in more detail below. The coating can bepatterned after application to substrate 101, such as by embossing orthe like, or can be printed on substrate 101 to form lens array 102,such as by digital printing including inkjet printing. Thin film displaydevice 100 c can have a gauge thickness (or focal distance) “t1” fromabout one to about ten mils, or about five mils or less, which includeslens array 102, and image 104 (light steering optical layer).

According to an embodiment depicted in FIG. 2, lens array 102 comprisesa lenticular lens array 112. Lenticular lens array 112 generallyincludes a plurality of elongated cylindrical lenses 114 over at least aportion of the first surface of substrate 101. In another embodimentdepicted in FIG. 3, lens array 102 comprises a fly's eye lens array 116.Fly's eye lens array 116 generally includes a plurality of dome-shaped,or circular lenses 118 over at least a portion of the first surface ofsubstrate 101. In other embodiments of the invention, other suitableshaped lenses, such as, for example, square, pyramidal, diamond, and thelike and combinations thereof, can be used to form lens array 102. Inone embodiment, fly's eye lens array 116 comprises rows and columns toform a matrix of lenses having square bases. In one embodiment, fly'seye lens array 116 is patterned using a thin film formula of r=(n−1)/n×fwhere r is the radius of curvature of a lenticular lens, C is aconstant, f is the focal length of optimal focus thickness for theplastic, and n is index of refraction of air.

In one embodiment, such as is depicted in FIG. 3 a, fly's eye lens array116 includes a plurality of lenses that can focus at about 1 to about 10mils, or about 5 mils. This is the focal distance, which is measuredfrom the peak of the lens through the image or image layer. Based onformula r=(n−1)/n×f where r is the radius of curvature of the lens, n isthe index of refraction of the plastic (for example, for APET n=1.57),and f is the thickness, or focal distance, of the lens. For example, fora fly's eye APET lens having a radius of curvature of about 1.76 mils,the focal distance and therefore thickness of the lens is approximately5 mils. Lens array 116 as illustrated is a 10×10 matrix; however, anyconfiguration can be contemplated. The lenses of the array can be allsubstantially the same shape as illustrated, or can be individuallyshaped. Each lens has a square base with each side “s” ranging fromabout 1 to about 5 mils, such as about 2.5 mils. The total height “h”,i.e., from the base to the top of the dome, of each lens is from about 1mil to about 10 mils, such as about 5 mils. The height “hd” of each domeis from about 0.1 mil to 2 mil, and more particularly about 0.5 mil. Theradius of curvature “rc” of each of the lenses is from about 0.5 mil toabout 2 mils, such as about 1.5 mils.

As discussed previously, fly's eye lens arrays have some advantages overlenticular lens arrays in that the fly's eye lens arrays create moreopportunities for animation direction, such as vertical, horizontal,and/or diagonal. Lenticular lenses are limited to animation in only asingle direction. In one embodiment as depicted in FIG. 8, a web 800 isprinted with image 104 for use as labels, such as beverage bottlelabels. For this type of application, often times the long edges of thelabels are in the machine or web direction. If a lenticular lens arrayis used, the lenticular lens array can only be extruded in the machineor web direction, thus requiring image 104 to be printed cross-web.However, if a fly's eye lens is used, it allows image 104 to be printedin either the machine or cross-web direction to give ultimateflexibility in fabrication of labels.

Image 104 can be printed using any of a number of suitable printingtechniques such as, for example, flexographic, lithographic, gravure,rotogravure, digital inkjet, digital toner, screen printing, and thelike and combinations thereof. Image 104 can be printed usingtraditional and non-traditional inkjet ink, dry offset ink, litho ink,flexo ink, silk screen ink, latex ink and the like in one of theaforementioned printing techniques or combination of techniques. Theinkjet ink used may be a traditional solvent- or UV-based ink. In oneembodiment, UV curable inks can be used, such as SUNCURE inkscommercially available from Sun Chemical of Carlstadt, N.J., and UVcurable inks commercially available from Flint Inks of St. Paul, Minn.Other suitable printing materials or media can include toners, water- orsolvent-based inks, solventless inks, other forms of radiation curableinks, and combinations thereof.

The printing or imaging technique can reduce or eliminate the need forprecise ink-to-ink registration accuracy. Rather than the standardinterlaced image of the prior art, image 104 can be incorporated by aone-color animation technique, hologravure technique, bi-directionalinterlacing, or combinations thereof. In one embodiment, one-coloranimation is used. A one-color animation technique includes designing adimensional image to get a desired dimensional effect by building theanimation images from only one color which overprints other colors of acolor process, such as a 4-CP separation. The advantage of one-coloranimation is that it is not necessary to have the colors in preciseink-to-ink registration. The animation will always be viewable and givehigh-quality dimension effect regardless of the register of the othercolors. Because of the elimination or reduction of the need for criticalink-to-ink registration accuracy, web press printing with registrationtolerances less than sheet fed press tolerances becomes a viablemanufacturing option without compromising image quality.

Hologravure images, known, for example, by the trade name INFINIDEPTH,are similar to one-color animations in that the animating effect istypically incorporated in one-color of a color process, such as a 4-CPseparation. However, hologravure techniques incorporate a holographicfringe pattern that gives a depth or 3D effect to the image, either incombination to the animation produced from one-color animation, oralone. Examples of hologravure techniques are set forth in a series ofcurrently pending and granted patent applications including U.S.Application Publication Nos. 2008/0088126 (issued as U.S. Pat. No.8,056,929) entitled “Layered Image Display Applications and Methods,”2008/0088931 entitled “Layered Image Display Sheet,” and 2008/0213528entitled “Customized Printing with Depth Effect” all of which areincorporated herein by reference in their entireties.

Bi-directional interlacing is an imaging process in which an interlacedimage is interlaced in a first direction, e.g. side-to-side orleft-to-right, and an interlaced image is interlaced in a seconddirection, e.g. top-to-bottom. The bi-directional interlaced image canthen be printed. One-color animation can be incorporated into thebi-directional interlaced image to accommodate limitations in theprinting process. Bi-directional interlacing can be used, for example,to create a 3D or animation illusion in a first direction, whilecreating other animation, color change, or a 3D effect in a seconddirection, depending on the viewing angle.

By incorporating a printing technique that reduces or eliminates theneed for ink-to-ink registration accuracy, display devices 100 can beprinted using web presses at high speeds that have finishingcapabilities in-line. Further, the above-referenced printing techniquesallow thin films, i.e. about ten mils or less, to be used to form a moreflexible display device that can be used in a wider variety ofapplications such as packaging applications, security applications, andon or around articles, such as on bottles, wrappers, bags, books, andany number articles, some of which are depicted in FIG. 4. Additionally,the above-referenced printing technologies allows for the use of lowercost materials which were not previously extrudable or casteconomically.

There are a number of different methods of fabricating dimensional imagedisplay device 100, including direct printing of a pre-formed lenssubstrate, printing of a substrate and lamination to a pre-formed lenssubstrate, direct embossing or patterning of a printed or non-printedsubstrate inline, applying a clear coating to a substrate and patterningthe coating inline after application, applying the coating in a patternby printing the coating, and combinations thereof.

Referring to FIG. 5, in one embodiment, thin film display device 100 acan be manufactured using a web press process 200 including lens array102 comprising a preformed lens array material in roll form. Examples ofsuitable lens array materials include a 10 mil APET 133 LPI lensavailable from Spartech, and a 5 mil polypropylene lens from MicroLens.The preformed lens arrays can be formed at 202 by casting or extruding aplastic material into a web, and subsequently patterning the desiredlens features into at least a portion of one of the surfaces of theplastic web. The patterning can be accomplished via embossing, laserengraving, or any of a variety of patterning techniques and combinationsthereof. The finished film is then wound into roll-form to be used inthe web printing press. The lens array film roll is unwound and entersone or more printing stations. At 204, a dimensional image 104 isprinted on at least a portion of the un-patterned surface of the lensarray film and/or on a separate substrate to form display device 100 a.Dimensional image 104 can be created in one or more colors usingone-color animations and/or hologravure. Dimensional image 104 can be astationary 3D image, an animated image including background and/orforeground movement, or both. Depending on the printing medium used,display device can pass to an inline optional cure station at 206 topartially or completely cure the printing medium. Suitable cure stationscan include, for example, UV curing, LED lights, heat or IR curing,E-beam curing, dryers, microwave, and any suitable curing station orcombinations thereof. In one particular embodiment of the invention, atleast part of dimensional image 104 is printed on a separate substrate101 from the preformed lens array material 102. The un-patterned surfaceof the preformed lens array material is bonded or laminated to substrate101 using a clear adhesive, fusing techniques, or any of a variety ofsuitable bonding techniques such that dimensional image 104 is viewablethrough lens array 102, thereby forming display device 100 a.

At 208, printed preformed lens array material can go to any of a varietyof inline and/or offline finishing steps, including, but not limited to,lamination to a substrate, converting, additional printing, additionalcuring, forming, labeling, packaging, and combinations thereof. Thefinished product can be in the form of labels to be applied to any of avariety of articles, or can be converted or formed itself into afinished article.

Referring to FIG. 6, in another embodiment of the invention, thin filmdisplay device 100 b can be manufactured using a web process 300.Process 300 includes an inline lens array process in which lens array102 is formed by patterning of substrate 101, such as a plastic film. At302, at least a portion of a first surface of the substrate film ispatterned with lens array 102, which can be carried out by any of avariety of patterning techniques for thin films know in the art, such asembossing, laser engraving, or the like. As disclosed in U.S. Pat. No.7,359,120 to Raymond et al., in one embodiment, a fabrication techniqueis inline embossing at high speeds using a roll embossing tool. In thisembodiment, a film is cast or extruded, and a pattern providing the lensarray is placed into the film with a heat or chilled roller. There areseveral methods of performing the embossing at these high speeds.Embossing can occur at the time a film is cast, calendared, or extruded.Normally, the embossing is done inline with a chilled embossing rollerwhile the film is still hot. The pressure is applied between a bottomand top roller. For example, the bottom roller may be a polished rollerand the top roller an engraved roller, e.g., made out of a nickel-coatedcopper that is accurately machined in an air bearing lathe. The hot filmcan comprise, for example, polypropylene, PET, cast PVC, calendar PVC,cast polypropylene, PETG, or any combination of film or co-extrusion.The chosen material should be stable and maintain the desired structurethrough the printing and embossing process. It is also important to notethat the refractive index of the material chosen dictates optimal lensthickness to provide accurate focusing of image 104. Depending uponwidth, temperatures, pressures, and other factors, the film may beembossed at up to 10,000 feet per minute. One reason for using a filmroller in the film embossing process is that the molecules in the filmform and freeze into place forming lens array 102 more accurately when ahot film is embossed with a chill roller regardless of the process.

In another embodiment, cold film can be used. Cold film can be heatedand embossed with a hot roller forming lens array 102. This can be doneat slightly below the melting temperature or at the melting temperatureof the film. The speed at which this embossing can be done is based uponthe heat and pressure of the equipment available. For example but not asa limitation, if a substrate melts at about 300 degrees Fahrenheit,embossing can be done at about that temperature and, in some cases, atabout 6,000 feet per hour.

In yet another embodiment, cold embossing can be used to form lens array102. Cold embossing can be done using extreme pressures between niprollers while narrow web widths are easier and require less tonnage. Itis possible in some embodiments, however, to emboss in wide web at up toand over about 60-inch web widths. Such cold embossing of lens array 102into plastic or other material substrates can be done at fairly highrates of speed such as up to about 10,000 feet per hour or more. This isdone much the way holographic embossing patterns are embossed in film.The structures tend to be accurate, but the life of the tool issometimes not very long due to the higher pressures utilized.

In yet another embodiment, and not necessarily for web-based processes,film patterning to form lens array 102 can also include platenembossing. Flat dies are engraved in copper magnesium, nickel, and othermetals. These dies are placed in equipment such as Bobst die cutters andHeidelberg's, Kluges, and other equipment manufacturers' die cutters,punches, presses, or the like used in platen embossing. The film may befed through in rolls or in sheets and embossed with heat and pressure orjust pressure to form lens array 102 on a side of the film or substrate.Lenses 108 are embossed onto any of the films using pressure and/or heatand appropriate dwell time to form lenses 108. A significant tonnage orhigh pressure is generally used to emboss the film in the case of platenembossing.

In any of the above embodiments, and particularly platen embossing, onecan have “spot” lens structures that can be registered to the printingin a way such that the lens does not always appear over the printing.

For embossing of lens array 102 to be effective, the flat dies orrollers/cylinders have to be accurately formed to include a reverseimage of one or more of lenses 108 (e.g., a number of parallel lens setextending side-by-side to provide a lens surface of a lens array). Inaddition to using diamond or other cutting tools to form the dies orembossing rollers, one of the methods of manufacture is the use ofphoto-etching for the engraving of the flat embossing dies or embossingcylinders or rollers. A standard method of photoengraving orphoto-etching is done by using an emulsion over a metal or polymersurface and then exposing the areas in which the photo emulsion may beexposed to UV light. The areas that are exposed generally remain intact(but it can be the opposite effect), and the remaining area is exposedand unprotected. An acid bath is generally used to wash away theunprotected areas (i.e., the areas that lacked the protective emulsion).The metal or polymer with a pattern defined by the emulsion is leftbehind leaving raised surfaces with a desired pattern and contour (e.g.,a reverse image of a particular lens array 102 or for a number of lensarrays as it is expected that numerous lens arrays may be embossed intoa film or sheet at one time in manufacturing processes, paired with aplurality of images). The process can be used to make etched dies forembossing papers and foils where some three-dimensional relief isneeded. This process can be done with a stationary light source.

At 304, the patterned film substrate 101 is printed with a dimensionalimage 104 in one or more print stations using one-color animation,hologravure technique, or combinations thereof, as described above.Dimensional image 104 can be printed onto substrate 101 before embossingat 302, after embossing at 302, or both forming display device 100.Dimensional image 104 can then be optionally cured, as discussed abovein step 306 in one or more curing stations. At 308, display device 100can go to any of a variety of inline and/or offline finishing steps,including, but not limited to, lamination to a substrate, converting,additional printing, additional curing, forming, labeling, packaging,and combinations thereof.

In another embodiment, a separate substrate is printed with image 104either inline or offline, and is bonded or laminated to the filmsubstrate 101 either before or after lens array 102 is embossed onsubstrate 101. Film substrate 101 can be printed in addition to theseparate substrate. For example, the one-color of one-color animationcan be printed directly onto the back of film substrate 101, whereas theremaining colors are printed on the separate substrate. Such separatesubstrates can comprise paper, plastic, metallized substrates such asfoil, paperboard, cardboard, glass, and combinations thereof. Bonding orlamination can be accomplished via a clear adhesive sandwiched betweensecond surface 110 and the separate substrate, or any of a number ofbonding techniques, such that dimensional image 104 is viewable throughlens array 102.

The finished product having a display device 100 a can be in the form oflabels to be applied to any of a variety of articles, or can beconverted or formed itself into a finished article.

Process 300 allows for formation of lens array 102 at 302 to be inlinewith printing at 304, as well as additional optional finishing at 306,and does not require separate equipment and/or process steps, therebyreducing the cost to make display device 100. The individual steps ofprocess 300 can be formed in any of a variety of configurations and arenot limited to the sequence shown in the block diagram of FIG. 6. It isalso contemplated that one or more steps of process 300 can be performedindividually at different times, depending on equipment availability,configuration, and other such factors. Further, thinner films can beused in process 300, such as films that have a gauge thickness of aboutten mils or less, thereby reducing the amount of plastic needed toproduce display device 100. However, it is contemplated that process 300can also be used to create display devices with thicker gauges, i.e.greater than about ten mils.

In yet another embodiment and referring to FIG. 7, thin film displaydevice 100 c can be manufactured by process 400. Process 400 includesapplying a coating at 402 to at least a portion of a first surface ofsubstrate 101, such as, for example, paper, plastic, paperboard,cardboard, glass, metallized substrates such as foil, and combinationsthereof. The coating can be applied either inline or offline. Thiscoating is patterned at 404 to form lens array 102. The coating iseither applied and then patterned, or can be patterned duringapplication, such as printing lens array 102 on substrate 101. The totalthickness of the patterned film assembly includes both substrate 101 andthe patterned coating. The coating is optionally cured at 406 beforepatterning at 404, after patterning at 404, or both to form lens array102.

Image 104 is printed at 408 on substrate 101 before and/or after thecoating is applied. Printing at 408 is accomplished similar to printingat 204 and 304 described above. Depending on the type of substrate used,image 104 can be printed on one or both surfaces of the substrate. Forexample, if the substrate is opaque, such as paper, image 104 can beprinted on first surface 104 and the coating is subsequently appliedover image 104. The second surface of the substrate can also be printed.Alternatively, if the substrate is transparent, the first surface can beprinted with image 104 before the coating is applied, and/or the secondsurface can be printed with image 104 before and/or after the coating isapplied to the first surface.

Image 104 can then be optionally cured, as discussed above at 410 in oneor more curing stations. At 412, printed lens array 102 can go to any ofa variety of inline and/or offline finishing steps, including, but notlimited to, lamination to a substrate, converting, additional printing,additional curing, forming, labeling, packaging, and combinationsthereof. The finished display device 100 can be in the form of labels tobe applied to any of a variety of articles, or can be converted orformed itself into a finished article.

The coating that is applied to at least a portion of the substrate 101can be, for example, a radiation curable coating such as e-beam, UV, orthe like, a water-based or solvent-based coating, varnishes, urethanes,acrylourethanes, any of a variety of suitable coatings. The coating canbe applied to at least a portion of substrate 101 by any of a number ofsuitable coating techniques including, but not limited to, extruding,casting, printing such as inkjet printing, flexographic printing,rotogravure, curtain coating, spraying, gravure, mire rod coating, andthe like. A total gauge thickness, i.e. substrate and patterned coating,can be anywhere from less than about 1 mil to about 40 mils,particularly less than 10 mils, and more particularly about less than 5mils.

In one embodiment of such coating processes, substrate 101 can comprisepaper, plastic, metallized substrates such as foil, paperboard,cardboard, glass, and combinations thereof. The substrate can be coatedwith a coating, such as a UV coating, at less than about 1 mil, such asabout ½ mil, to about 5 mils, and the coating can be cured through anengraved roller which may be glass or clear plastic. The roller is clearsuch that the UV or E-beam is directed to pass through the roller whileit is in contact with the substrate and squeezing the coating into placeon the substrate, whereby lenses 108 are formed exactly or within verytight tolerances while they are cured to form a lens array 102.

In another embodiment, a coating, such as a UV coating, is applied to atleast a portion of a first surface of the substrate using the abovedescribed techniques for coating application. The coated web is thensandwiched or nipped between a patterned or engraved belt laminatorhaving a relief of the lens array pattern, and a chill roll. One or morecure stations, such as a UV lamp, are placed within the belt laminatorassembly such that the patterned web is cured as it passes over thechill roll, forming lens array 102 on at least a portion of thesubstrate. The substrate is printed with image 104 either before thecoating is applied, or after lens array 102 is formed, or both.

In yet another embodiment, a coating, such as a UV coating, is appliedto at least a portion of the first surface of the substrate. The coatedweb then passes through a metal press, such as a platen press having afirst machined plate with a relief of the lens array pattern proximatethe coated side of the web, and a planar plate positioned proximate theuncoated side of the web. Pressure and optional heat are applied tolocalized areas of the web to form the pattern in the coating. One ormore subsequent cure stations, such as a UV lamp, are positioned downwebto cure the patterned coating to form lens array 102. Again, thesubstrate is printed with image 104 either before the coating isapplied, or after lens array 102 is formed, or both.

In another embodiment, a coating, such as a UV coating, is applied to atleast a portion of the first surface of the substrate. A machined bladewith grooves, for example, is selectively positioned proximate thecoated side of the web to form a pattern in the coating, such aslenticules in the machine direction. One or more subsequent curestations, such as a UV lamp, are positioned downweb to cure thepatterned coating to form lens array 102. Again, the substrate isprinted with image 104 either before the coating is applied, or afterlens array 102 is formed, or both.

In another embodiment, a coating, such as a UV coating, is applied to atleast a portion of the first surface of the substrate. Similar to thebelt laminator embodiment, the coated web is then sandwiched or nippedbetween a patterned or laser-engraved silicone roller or flexographicphotopolymer plate having a relief of the lens array pattern, and achill roll. One or more subsequent cure stations, such as a UV lamp, arepositioned downweb to cure the patterned coating to form lens array 102.Again, the substrate is printed with image 104 either before the coatingis applied, or after lens array 102 is formed, or both.

In yet another embodiment, a coating, such as a UV coating, is appliedto at least a portion of the first surface of the substrate. A UV lampis positioned proximate the coated surface of the substrate to at leastpartially cure the coating. A heated machined metal roll is placeddownweb from the UV lamp. The metal roll is engraved with the relief ofthe lens array pattern. The substrate is sandwiched between the machinedroll and a nip roll to emboss lens array 102 in the coating. One or moresubsequent cure stations can then be placed after the machined roll tofurther cure the coating if is not already completely cured. Again, thesubstrate is printed with image 104 either before the coating isapplied, or after lens array 102 is formed, or both.

In yet another embodiment, a coating, such as a UV coating, is appliedto at least a portion of the first surface of the substrate using adigital printing press, such as inkjet heads, to apply a patternedcoating in accordance with a desired lens array, thereby eliminating theembossing step. One or more subsequent cure stations, such as a UV lamp,are positioned downweb to cure the patterned coating to form lens array102. Again, the substrate is printed with image 104 either before thecoating is applied, or after lens array 102 is formed, or both.

In any of the above coating processes, a substrate 101 can be coatedwith any of the clear coatings mentioned above (keeping in mind that anycoating and its refractive index is combined with the thickness andappropriate film refractive index for the appropriate and pre-engineeredthickness of the lens array). In alternative embodiments, after thecoating is applied to substrate, it can be cured and then patterned. Inother embodiments, the coating is only partially cured and thenpatterned while it is in a semi-liquid state. In some other embodiments,the coating on the substrate is patterned in a total liquid state ormore liquid state and then cured after the patterning such as down theweb a few feet up to several hundred feet. In the former case where theliquid is partially cured, the coating may have a final curing laterdown the production line either immediately or down the web severalfeet, and in some cases, the coating may be pre-engineered to post curein a solid state several hours or even days later to an acceptablehardness.

The finished product with display device 100 can be in the form oflabels to be applied to any of a variety of articles, or can beconverted or formed itself into a finished article.

Process 400 allows for formation of lens array 102 in steps 402 to 406to be inline with printing at 408, as well as additional optionalfinishing at 412, and does not require separate equipment and/or processsteps thereby reducing the cost to make display device 100. Theindividual steps of process 400 can be formed in any of a variety ofconfigurations and are not limited to the sequence of steps as shown inthe block diagram of FIG. 7. It is also contemplated that one or moresteps of process 400 can be performed individually at different times,depending on equipment availability, configuration, and other suchfactors. Further, thinner films can be used in process 400, such asfilms that have a gauge thickness of about ten mils or less, therebyreducing the amount of material or plastic needed to produce displaydevice 100. However, it is contemplated that process 400 can also beused to create display devices with thicker gauges, i.e. greater thanabout ten mils.

In another embodiment, lens array 102 is formed by embossing inline on aconverting station. For example, referring to FIG. 9, a system 900 forproducing a thin film dimensional product comprises an unwind station902 with a web 904 of a polymeric material, such as polypropylene,polyethylene, APET, PVC, or the like. Web 904 can be pre-printed on afirst surface 906 a with a dimensional image as described supra. In analternative embodiment, web 902 can comprise a plurality of sheets,rather than a continuous roll.

Web 904 advances from unwind station 902 to one or more convertingstations 908. Converting station 908 can comprise, for example, a diepunch, rotary die, guillotine, or any of a variety of convertingequipment. Web 904 can include an eye mark and converting station 908can comprise a sensor such that when the sensor senses the eye mark, theadvancement of web 904 is halted, and the converting station 908 isactivated to convert a portion 910 of web 902 that is positioned withinunwind station 902 to the desired design.

System 900 can comprise additional converting stations 908. When portion910 advances from a first converting station 908 a to a secondconverting station 908 b having a sensor, the second converting station908 b senses the eye mark, again halting web 902 such that portion 910is within second converting station 908 b and a second portion 912 ofweb 902 is within first converting station 908 a. Converting stations908 a and 908 b are simultaneously activated such that first portion 910is converted by second converting station 908 b, as second portion 912is converted by first converting station 908 a.

System 900 can further comprise a lens embossing station 914. Lensembossing station 914 can comprise, for example, a platen. A lens die916 is coupled to lens embossing station 914. Lens die 916 can comprise,for example, the negative of the desired lens pattern. As web 902advances to embossing station 914, a sensor senses the eye mark, andhalts web 902 such that portion 910 is within embossing station 914. Inan embodiment, embossing station 914 is activated prior to activation offirst or second converting stations 908 a,b. In another embodiment,embossing station 914 is simultaneously activated with one or moreconverting stations 908. Heat and pressure is applied such that a secondsurface 906 b is in contact with lens die 916 and is therefore embossedwith the desired lens pattern.

Web 902 is then advanced to winding station 918, where web 902 is woundinto a roll of embossed, converted product.

One of ordinary skill in the art would recognize that one or moreconverting stations 908 and one or more embossing stations 914 can beconfigured in any of a variety of configurations. System 900 isgenerally configured, however, such that embossing station 914 can beactivated before converting stations 908.

The above-mentioned processes also are adapted for spot coating of alens array, thereby allowing one to selectively created an image displayarea on portions of the web such that the image display device isselectively positioned on the finished article. For example, an articlecan have printing over a portion of its exterior. A lens array can beformed over only portions of the printing such that the dimensionalimage display device is selectively positioned on an article.

The above-mentioned processes, particularly process 400, can also beused in direct food contact applications that otherwise would requireoverwrapping. For example, the coating in process 400 can be printedover image 104, or a lens array 102 can be laminated over image 104,which buries or protects otherwise migratory materials, such as inks.Display devices 100 can then be used in packaging that is in directcontact with food products, without requiring overwrapping, therebyeliminating additional steps and costs.

In any of the above described processes, lens array 102 interacts withimage 104, thereby requiring acceptable ink-to-lens registrationaccuracy. However, the processes described above do not require thecritical ink-to-ink registration accuracy of conventional technologies.Further, the lens array and image interaction of the display device ofthe invention are different from other known technologies thatincorporate a basic background and a lens array that is designed tointeract with light which in turn randomly interacts with the backgroundto produce an effect. These techniques do not require ink-to-lensregistration accuracy because the image is not mapped to the lenses asin the present invention.

In an embodiment, a display device comprises a first substrate surfacepresenting a lens array and a second substrate surface presenting aprinted image, wherein the first and second substrate surfaces areopposing, the lens array defines a web including a plurality ofsubstantially circular lenses, and an animation of the printed image istri-directionally viewable through the web.

High definition thin film dimension display device 100 can be used in avariety of applications because of its high degree of flexibility. Theflexibility of the thin film dimension display device is determined by adrape test which measures the level of drape of the light steeringoptical layer or the like. The drape test involves placing the lightsteering optical layer of display device 100 on a draping tester whichis a raised platform with a straight edge. Display device 100 is placedon the platform such that a predetermined portion drapes over an edge ofthe platform. A protractor is positioned such that the flat side of theprotractor is flush with the platform surface, and the measurement arcextends below the platform surface. An angle reading of the protractoris taken at the lowest point of the material. Display devices ofembodiments of the present invention have flexibilities of at leastabout eight degrees when measured from the horizontal surface orplatform.

Drape testing was performed on thin film display devices that weremanufactured according to at least one embodiment of the presentinvention. The drape test was performed at 74 degrees Fahrenheit and 43percent relative humidity. Each sample strip was 3¼ inches by 8¼ inches.Each sample strip was placed on the drape tester platform lens side upwith approximately 3 inches of the long edge draping over the platformedge. A display device having a light steering optical layer of about 10mils had a drape of about eight degrees; a display device having a lightsteering optical layer of about 5 mils had a drape of about 25-26degrees.

The invention may be embodied in other specific forms without departingfrom the essential attributes thereof; therefore, the illustratedembodiments should be considered in all respects as illustrative and notrestrictive.

1. A thin film display device for displaying a dimensional image comprising: a lens array, the lens array including a plurality of lenses; and a printed image layer viewable through the lens array, wherein the printed image layer is printed using an imaging technique such that the dimensional image is independent of ink-to-ink registration accuracy when printing more than one color, wherein the printed image layer and the lens array define a light steering optical layer having a thickness of about ten mils or less.
 2. The thin film display device of claim 1, wherein the lens array comprises a preformed lens material having a first surface including the plurality of lenses, and a flat second surface, and wherein the flat second surface of the lens material is bonded to a substrate.
 3. The thin film display device of claim 2, wherein the printed image layer is printed on at least a portion of the flat second surface of the lens material, the substrate, or both.
 4. The thin film display device of claim 1, wherein the lens array comprises a polymeric film, and wherein at least a portion of a first surface of the polymeric film is embossed to form the plurality of lenses thereon.
 5. The thin film display device of claim 4, wherein the printed image layer is printed on at least a portion of the second surface of the polymeric film opposite the lens array.
 6. The thin film display device of claim 5, further comprising a laminate applied over at least a portion of printed image layer.
 7. The thin film display device of claim 1, wherein the lens array comprises a coating applied to a first surface of a substrate, and wherein at least a portion of the coating is patterned to form the plurality of lenses.
 8. The thin film display device of claim 7, wherein the printed image layer is printed on the first surface of the substrate before the coating is applied.
 9. The thin film display device of claim 7, wherein the substrate is transparent, and the printed image layer is printed on the first surface of the substrate, a second surface opposite the coating, or both.
 10. The thin film display device of claim 1, wherein the lens array comprises a plurality of lenticules, fly's eye lenses, or both.
 11. The thin film display device of claim 1, wherein the thickness of the light steering optical layer is about five mils or less.
 12. The thin film display device of claim 1, wherein the imaging technique is selected from one-color animation, bi-directional interlacing, hologravure, or combinations thereof, and wherein the dimensional image comprises an animating image, a three dimensional image, an image having depth effect, or combinations thereof.
 13. A thin film display device for displaying a dimensional image comprising: a lens array, the lens array including a plurality of lenses; and a printed image layer viewable through the lens array, wherein the printed image layer is printed using an imaging technique selected from one-color animation, bi-directional interlacing, a hologravure technique, or combinations thereof, wherein the printed image layer and the lens array define a light steering optical layer having a thickness of about ten mils or less.
 14. The thin film display device of claim 13, wherein the lens array comprises a preformed lens material having a first surface including the plurality of lenses, and a flat second surface, and wherein the flat second surface of the lens material is laminated to a substrate.
 15. The thin film display device of claim 14, wherein the printed image layer is printed on at least a portion of the flat second surface of the lens material, the substrate, or both.
 16. The thin film display device of claim 13, wherein the substrate comprises a polymeric film, and wherein at least a portion of a first surface of the polymeric film is embossed to form the lens array thereon.
 17. The thin film display device of claim 16, wherein the printed image layer is printed on at least a portion of the second surface of the polymeric film opposite the lens array.
 18. The thin film display device of claim 13, wherein the lens array comprises a coating applied to a first surface of the substrate, and wherein at least a portion of the coating is patterned to form the plurality of lenses.
 19. The thin film display device of claim 18, wherein the printed image layer is printed on the first surface of the substrate before the coating is applied.
 20. The thin film display device of claim 13, wherein the plurality of lenses comprises at least one lenticular lens, one fly's eye lens, or both. 